A second health care worker at a Dallas hospital who provided care for the first Ebola patient diagnosed in the U.S. has tested positive for the disease, the Texas Department of State Health Services said Wednesday.

The death of Thomas Eric Duncan, from the Ebola virus he contracted in West Africa, has now led to the first transmitted case of Ebola in the United States, in a nurse who cared for Duncan at Texas Health Presbyterian Hospital in Dallas.

A judge has reversed his own ruling and ordered a teenage boy awaiting trial in a Pennsylvania high school stabbing rampage to remain in a juvenile detention center and receive mental health treatment there.